Domain mail delivery from a dialup account

Installation

• Needs Eric Allman's latest sendmail-8.7.5 package at ftp://ftp.cs.berkeley.edu/ucb/sendmail/sendmail.8.7.5.tar.gz
  With it comes makemap. This is needed to maintain the /etc/mailertable file.
• Needs new /etc/sendmail.cf. This file is not one that people mess with anymore - it is built from m4 macro files.
• Needs Hannah Schroeter's <hannah@mamba.pond.sub.org> Batch SMTP package on ftp://ftp.wizzy.com/pub/wizzy/bsmtp-0.93.tar.gz.
  This includes Andy Rabagliati's <andyr@wizzy.com> deliver perl script to run on being fingered.
• Install the Batch SMTP package. Hannah has a nice configure script that asks you the details of your system, and searches for the relevant tools, and patches his code (and mine) appropriately. One question is asked that may puzzle you - where are "private binaries" kept. You may choose to go with the default, but make sure the directory exists, or I put them in /etc/mail. This writes files in /var/spool/bsmtp, directory owned by daemon, if you go with the suggested defaults.
• Your sendmail.cf file must be rebuilt with Batch SMTP support. The package above includes the relevant m4 macro files.
  • Go to the place on your system where you keep your sendmail configuration files - in my case that is /usr/local/src/sendmail-8.7.5/cf/cf/
  • Example source in provider.mc - note particularly the line MAILER(bsmtp)dnl
  • Put the macro files for the BSMTP mailer in the mailer directory - in my case that would be /usr/local/src/sendmail-8.7.5/cf/mailers/bsmtp
  • Type make provider.cf
• Needs Mike Shanzer's fingerd-1.3 package at ftp://kiwi.foobar.com/pub/fingerd.tar.gz or my local copy on ftp://ftp.wizzy.com/pub/wizzy/fingerd.tar.gz. It must be configured to run the perl script below when mail@provider.com is fingered. I install the fingerd configuration files in /usr/local/etc/finger, and add this line to the users file :-
  mail: /usr/local/etc/finger/deliver %H

Maintenance

Add bsmtp account :-

• add domain.com to /etc/mailertable, as domain.com bsmtp:domain.com
• create /etc/mailertable.{pag|dir} with the following command :- /etc/mail/makemap dbm /etc/mailertable
• send the following message to account owner :-

  From: postmaster@provider.com
  To: user@provider.com
  Subject: Batched SMTP delivery of mail
  
  Dear account owner,
  
  Mail delivery to your domain has been changed to use Batched SMTP.
  
  You MUST have an SMTP server running on the machine mail.domain.com
  whenever you are dialed up to provider.com.
  
  Any mail addressed to your domain, or any sub-domain of your toplevel
  domain, is delivered as follows :-
  
  1. If you are online, it is delivered directly to your mailserver,
     mail.domain.com.
     
  2. If you are offline, it is saved in a file at provider.com.
  
  To trigger delivery of saved mail, use "finger mail@provider.com" while
  online. This will deliver all saved mail to your SMTP server above.
  
  --
  postmaster@provider.com